Radiator



K, MARET `April 30, 1935.

RADIATOR Filed Nov. 20, 1935 `fr Venfor.-

Patented Apr. 30,' 193.5

This invention relates to a radiator of sheet metal.

The vessels of the existing types of radiators of sheet metal comprise `screw joints or weldings for their uniting. Connection by screwing requires a number of screw members which are quite expensive to produce and which have to be packed relative to one another. Autogenous welding, on the other hand, is costly and bothersome, and in both cases the radiators are of relatively high cost.

It is the object of the' invention to reduce this cost of production as much as possible, and this object attained by rolling Ythe pressed out radiator necks into connecting or spacing rings.

By way of example, theinvention is illustrated in the accompanying drawing, which shows two embodimentsthereof and in which Figure l is a section of a radiator whose members are some distance apart-'from each other; and Figs. 2 a and b, sections of radiators whose members are closely adjacent,

Referring to the drawing, the shells I of the radiator, which are pressed from thin steel plate or other suitable material, possess a neck 2 pressed out of the radiator top and are united by welding to form a radiator vessel. Inside the top the usual stiffening bush 3 is providedand has passages @for the heating medium. small radiator group the bush 3 may be dispensed with if the individual tops possess already suicient stiness.

The spacing rings 5 for ,connecting the various vessels are slipped over the pressed out necks and connected with these necks and possibly with the stiiening bushes 3 by rolling. For this purpose the spacing rings 5 possess on their inner surface two annular grooves t arranged at y a distance from one another and adapted to receive both the neck 2 of the radiator top and the stiiening bush 3 which are Vclosely rolled into the grooves by suitable machinery.

The construction according to Figs. 2 a and b is a simpliiied form of the one shown in Fig. l, owing to the use of short connecting rings. For this purpose, eachA radiatorV vessel is provided on one side of its top with a connecting neck 2 having a large diameter and on the other side with a neck 2 o small diameter. When assembling the vessels l their necks are telescoped,

so that each unit receives with its wide neck.

2 the narrow neck 2 of the adjacent vessel, the diameters of the necks being chosen so that the narrow neck 2' will just t into the wide neck 2". The rings 5, inserted between the units possess each an annular groove 6 in which the In ar UNITED STATES PATENT OFFICE RADIATOR Karel Maret, Mahr.-Ostrau, Czechoslovakia, assignor to Socit de Dietrich & Cie, Reichshoffen, Bas-Rhin, France Application November 20, 1933, Serial No. 698,912 4In Czechoslovakia November 25, 1932 4 claims. (o1. 257-149) two telescoped necks 2 and 2 are embedded by rolling.

This connection is extraordinarily firm, tight and durable and requires only a narrow connecting ring 5. Furthermore, only a single groove 5 is required, which means a saving in material and tools.

It is of course possible to provide this narrow ring 5 with two or more adjacent grooves if a single groove should not suice for packing, though one groove will do as a rule.

vIi" stiiening bushes according to Fig. l are to be used, they can be rolled into the annular groove E of the connecting ring 5 together with the telescoped necks 2 and 2".

'Ihe free edge of the inner neck of one vesse may be bent at 'l around the bending point of the outer neck of the adjacent vessel to increase the packing tightness of the connection.

VRadiators according to the invention can thus be produced very cheaply, the parts being very close to one another and firmly united.

I claim:-

1. A radiator comprising a plurality of sheet metal vessels, a pair of pressed out necks on each vessel, connecting rings surrounding the pressed out necks of adjacent vessels, grooves in the connecting rings and depressions in the necks and fitting in the grooves.

2. A radiator comprising a plurality of sheet metal vessels, a pair of pressed out necks on each vessel, stiffening bushes extending from neck to neck, connecting rings surrounding the pressed y out necks of adjacent vessels, grooves in the connectingrings and depressions in the stiffening. bushes and necks and tting in the grooves.

3. A radiator comprising a plurality of sheet metal vessels, a pair of pressed out necks of different diameter on each vessel, the necks of smaller diameter being fitted into the necks of larger diameter of the adjacent vessels, connecting rings surrounding the pressed out necks of larger diameter, grooves in the connecting rings and depressions in the engaging necks and fitting in the grooves.

4'. A radiator comprising a plurality of sheet metal vessels, a pair of pressed out necks of different diameter on each vessel the necks of smaller diameter being fitted into the necks of larger diameter of the adjacent vessels, connecting rings surrounding the necks of larger diameter, grooves in the connecting rings, depressions in the necks and fitting in the grooves and bent out portions on the edges of the inner necks.

KAREL MARET. 

